Door-check



R. N. CHERRY.

(No Model.

DOOR CHECK.

No. 402,804. Patented May 7, 1889.

ATTOH/VEKY UNITED STATES PATENT OFFICE.

ROBERT N. CHERRY, OF JERSEY CITY, NEl/V JERSEY.

DOOR-CHECK.

SPECIFICATION forming part of Letters Patent No. 402,804, dated May 7, 1889.

Application filed December 20, 1888. Serial No. 294,176. (No model-l To ail whom, it may concern.-

Be it known that I, ROBERT N. CHERRY, a citizen of the United States, residing at- Jersey City, in the county of Hudson and State of New Jersey, have invented new and useful Improvements in Door-Checks, of which the following is a specification.

This invention has for its object to provide a novel door-check of the type wherein a fluidcontaining cylinder having a piston or plunger is employed; and the invention consists in the combination, with a door, a door-frame, a fluid-containing cylinder on the door-frame, and a plunger in the cylinder, of a laterallyswinging bracket pivoted to the door-frame and having an eye at its outer extremity and a guide-chain secured about centrally between its two extremities to the eye of the bracket, and having its said extremities connected, respectively, with the door and the plunger, as will be more fully hereinafter described, reference being made to the accompanying drawings, in which Figure 1 is a face view of a door provided with one of my cheeks. Fig. 2 is a sectional view taken vertically through the door, Fig. 1, and showing the cylinder that is secured to the door-frame, partly in section. Fig. 3 is a plan or top view when the door is closed. Fig. 1 is a similar view of the same when the door is open. Fig. 5 is a vertical section of the check-cylinder detached, on a larger scale than the previous figures. Fig. 6 is a sim lar view showing another type of fluid-containing cylinder.

Similarletters indicate corresponding parts.

In the drawings, the letter A designates the door-frame, and B is the door. A door-spring, C, of any suitable construction, serves to close the door.

The mechanism which I use for the purpose of controlling the closing movement of the door, and which is intended to prevent the door from slamming or from closing so fast that it is liable to strike the person passin g in through the door, is constructed as follows:

D represents a cylinder closed at the bottom and open at the top. This cylinder is secured to one of the jambs of the door-frame, and into it is fitted a plunger, E, which is connected by means of a chain, F,with the door B. The

chain F is fastened in an eye, a, formed in a bracket, G, which is secured to the door-frame by means of staples b b in such a manner that it can swing inward to the position shown in Fig. 3 or outward to the position shown in Fi 4.

The bracket swings laterally and the guidechain is secured about centrally between its two extremities to the eye at the outer end of the bracket, and the two extremities of said guide-chain are connected, respectively, with the plunger E and the door B. The chain F is of such a length that when the door is closed the plunger E is raised to the top, or nearly so, of the cylinder D, and when the door is being opened the plunger descends into the cylinder by its inherent gravity.

In Fig. 5 I have shown that known type of fluid-containing cylinder wherein the bore of the lower portion of the cylinder is slightly larger than the upper portion, so that when the plunger in its descent passes the point 0, Fig. 5, a passage, f, is formed. between its outer surface and the inner surface of the cylinder, while the plunger fits the upper small portion of the cylinder snugly. In the body of the plunger are vertical passages d, and on the upper surface of said plunger is placed a disk, 6, which is guided by the shank of the staple or eye 0. The cylinderD is filled with water or other liquid, and as the door is being opened the plunger E moves down in the cylinder, and as it moves down the disk 6 is raised and the liquid can flow freely through the passages d. Then the door is wide open, the plunger occupies the position shown in Fig. 5, and as the door begins to close by the action of the door-spring O the plunger rises, but its upward movement is checked by the atmospheric pressure acting upon the column of liquid in the cylinder.

In Fig. 6 I have shown another known type of fluid-containing cylinder; but neither of the cylinders shown is broadly claimed,. in that my invention does not reside solely therein, but in the novel combination and arrangement of parts specifically set forth and claimed.

IVhat I claim as new, and desire to secure by Letters Patent, is

The combination, with the door, the doorframe, the fluid-containing cylinder 011 the door-frame, and the plunger in the cylinder,

of the laterally-swing'ing bra-eket pivoted to In testimony whereoflhave hereunto set my the door-frmne and having an eye at its outer hand and seal in the presence of two SUbSCllb- 1o extremity, and the guide-chain secured about ing Witnesses.

centrally between its two extremities to the n r1 1 1 r 5 eye of the bracket and having its said ex- ROLhRl UILRRK' l'l'filllllllQS connected, respectively, with the "Witnesses:

deer and the plunger, snhstn nlially as de- 711. C. HAUFF,

scribed. E. F. KASTENHUBER. 

